<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 浅比较
        // react: state = { 1: [{}, {}, {}]}
        // 状态1 ===> state,
        // 状态2 ===> state[1].push({})   ==> { 1: [{}, {}, {}, {}]}
        // 状态3 ===> { ...state}

        var state = { 1: [{},{},{}]}

        // state[1].push({})  
        // return state

        var state3 = {...state}
        console.log(state === state3)


    </script>
</body>
</html>